#!/bin/bash
#############################################################################
#  Copyright (C) 2013-2015 Lawrence Livermore National Security, LLC.
#  Produced at Lawrence Livermore National Laboratory (cf, DISCLAIMER).
#  Written by Albert Chu <chu11@llnl.gov>
#  LLNL-CODE-644248
#
#  This file is part of Magpie, scripts for running Hadoop on
#  traditional HPC systems.  For details, see https://github.com/llnl/magpie.
#
#  Magpie is free software; you can redistribute it and/or modify it
#  under the terms of the GNU General Public License as published by
#  the Free Software Foundation; either version 2 of the License, or
#  (at your option) any later version.
#
#  Magpie is distributed in the hope that it will be useful, but
#  WITHOUT ANY WARRANTY; without even the implied warranty of
#  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
#  General Public License for more details.
#
#  You should have received a copy of the GNU General Public License
#  along with Magpie.  If not, see <http://www.gnu.org/licenses/>.
#############################################################################

# This is used by scripts, don't edit this
#
# This file has common node identification functions. These are used
# predominantly to determine what node you're presently
# configuring/setting up/running on.  Should be sourced and used only
# after magpie-setup-core is run b/c it depends on master/workers to be
# setup.

source ${MAGPIE_SCRIPTS_HOME}/magpie/exports/magpie-exports-dirs
source ${MAGPIE_SCRIPTS_HOME}/magpie/lib/magpie-lib-helper

Magpie_am_I_master () {
    local myhostname
    Magpie_get_magpie_hostname
    myhostname=${magpie_hostname}

    Magpie_make_all_local_dirs_node_specific

    for project in HADOOP HBASE HIVE SPARK STORM KAFKA ZEPPELIN ZOOKEEPER RAY ALLUXIO
    do
        local setupvar="${project}_SETUP"
        local confdirvar="${project}_CONF_DIR"
        if [ "${!setupvar}" == "yes" ] && [ -f "${!confdirvar}/masters" ]
        then
            if grep -q -E "^${myhostname}$" ${!confdirvar}/masters
            then
                return 0
            fi
        fi
    done

    return 1
}

# For the common pattern
__Magpie_am_I_a_project_node () {
    local myhostname
    local confdir=$1
    local noderankvar=$2
    local mastersfile=$3
    local workersfile=$4

    Magpie_get_magpie_hostname
    myhostname=${magpie_hostname}

    Magpie_make_all_local_dirs_node_specific

    if [ "${mastersfile}X" != "X" ]
    then
        if grep -q -E "^${myhostname}$" ${confdir}/${mastersfile}
        then
            eval ${noderankvar}=0
            return 0
        fi
    fi

    if [ "${workersfile}X" != "X" ]
    then
        if grep -q -E "^${myhostname}$" ${confdir}/${workersfile}
        then
            local noderank=`grep -n -E "^${myhostname}$" ${confdir}/${workersfile} | awk --field-separator=':' '{print $1}'`
            eval ${noderankvar}="${noderank}"
            return 0
        fi
    fi

    return 1
}

Magpie_am_I_a_hadoop_node () {
    if echo ${HADOOP_VERSION} | grep -q -E "3\.[0-9]\.[0-9]"
    then
        __Magpie_am_I_a_project_node ${HADOOP_CONF_DIR} "hadoopnoderank" "masters" "workers"
    else
        __Magpie_am_I_a_project_node ${HADOOP_CONF_DIR} "hadoopnoderank" "masters" "slaves"
    fi
    return $?
}

Magpie_am_I_a_hadoop_namenode () {
    # Only check masters for namenode
    __Magpie_am_I_a_project_node ${HADOOP_CONF_DIR} "hadoopnoderank" "masters" ""
    return $?
}

Magpie_am_I_a_hbase_node () {
    __Magpie_am_I_a_project_node ${HBASE_CONF_DIR} "hbasenoderank" "masters" "regionservers"
    return $?
}

Magpie_am_I_a_hive_node() {
    # Hive only runs on the master
    __Magpie_am_I_a_project_node ${HIVE_CONF_DIR} "hivenoderank" "masters" ""
    return $?
}

Magpie_am_I_a_phoenix_node () {
    Magpie_am_I_a_hbase_node
    return $?
}

Magpie_am_I_a_spark_node () {
    if echo ${SPARK_VERSION} | grep -q -E "3\.[1-9]\.[0-9]"
    then
        __Magpie_am_I_a_project_node ${SPARK_CONF_DIR} "sparknoderank" "masters" "workers"
    else
        __Magpie_am_I_a_project_node ${SPARK_CONF_DIR} "sparknoderank" "masters" "slaves"
    fi
    return $?
}

Magpie_am_I_a_kafka_node () {
    __Magpie_am_I_a_project_node ${KAFKA_CONF_DIR} "kafkanoderank" "masters" "workers"
    return $?
}

Magpie_am_I_a_storm_node () {
    __Magpie_am_I_a_project_node ${STORM_CONF_DIR} "stormnoderank" "masters" "workers"
    return $?
}

Magpie_am_I_a_zeppelin_node() {
    # Zeppelin only runs on the master
    __Magpie_am_I_a_project_node ${ZEPPELIN_CONF_DIR} "zeppelinnoderank" "masters" ""
    return $?
}

Magpie_am_I_a_zookeeper_node () {
    # Do not consider the 'master' node, it is only for launching
    # Zookeeper, it is not an actual Zookeeper node
    __Magpie_am_I_a_project_node ${ZOOKEEPER_CONF_DIR} "zookeepernoderank" "" "workers"
    return $?
}

Magpie_am_I_an_alluxio_node () {
    # Alluxio only runs on the master
    __Magpie_am_I_a_project_node ${ALLUXIO_CONF_DIR} "alluxionoderank" "masters" "workers"
    return $?
}
